evaluate
how I will solve this sum ??
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preetdhami:
cos(90-82)=cos8=====0
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Hey your answer is here.....
(i).cosec82°-sec8°
=cosec(90°-8°)-sec8°
=sec8°-sec8°
=O
(ii).sec70°sin20°+cos20°cosec70°
=sin20°/cos70°+cos20°/sin70°
=sin20°/cos(90°-20°) + cos20°/sin(90°-20°)
=sin20°/sin20° + cos20°/cos20°
=1+1
=2
Hope it help you....
(i).cosec82°-sec8°
=cosec(90°-8°)-sec8°
=sec8°-sec8°
=O
(ii).sec70°sin20°+cos20°cosec70°
=sin20°/cos70°+cos20°/sin70°
=sin20°/cos(90°-20°) + cos20°/sin(90°-20°)
=sin20°/sin20° + cos20°/cos20°
=1+1
=2
Hope it help you....
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